My puppy has all of a sudden lost his appetite, he's a 12 week old South African Boerboel and I bought him from a friend two weeks ago. When he first came he was eating a lot then on Sunday(two days ago) after I gave him a wash three hours later he became very depressed looking and didn't want to eat anything. Hes not playing with my other puppy, occasionally he shows signs of happiness but he's mostly just sleeping and not wanting to eat. I usually feed my dogs kibbles but he won't eat those he would rather have meat chunks or milk... Please help me because its worrying me, I'm yet to take him to the vet for he's checkup but he's due for his first one on the 15th of August When he's exactly 12 weeks old.